an insulting term from the Wizarding World of Harry Potter (created by JK Rowling). The term itself means, dirty blood. The insult is directed towards witches or wizards who are Muggle-born, someone with non-magic parents. This term is usually used by haughty pure-bloods, witches or wizards who are of magical descent and consider themselves to be higher up in rank. Such as the Malfoy family. The term Muggle-born is very much preferred to the term 'Mudblood.' Throughout the course of the books discrimination against Muggle-borns or 'Mudbloods" intensifies.

The term used for insulting Muggle-borns or First-Generation witches or wizards. Mudblood is the thing all of the prejudice is based on. Students of Hogwarts seem not to really care about skin color or gender. Instead, it focuses on the bloodline of a witch or wizard. Contrary to popular beliefs, Muggle-borns or Mudbloods are just as good, if not better than Purebloods.

A mudblood is a child with one parent who is white and another parent who is black (or sometimes just non-white). The pure white blood has been "dirtied" by the black blood, hence the term "mudblood". The mudblood's white parent is most often refered to as a "mudshark".

Bob: WTF. You see how many mudbloods that white chick has. Why would she ever want such a thing for her kids; taking away their pure white blood and all.

George: Idk, maybe she wants to make her white father mad or maybe she's one of those white chicks that thinks she's black just because she lives within the city limits.

1. A demeaning name for those who are born into muggle families and can use magic. These people tend to be disliked by Slytherins due to Slytherins being pure-blooded and believe that only pure bloods should be able to attend Hogwarts.
2. Tend to be intelligent witches and wizards. e.g. Hermione Granger, Lilly Potter